Meet Juergen, actually the world's worst market timer. He invested in the German Stock exchange in 1914. In 2014 he finally broke even.
Over the last 100 years, the US has had a great run and stock market returns have reflected that. By only looking at American returns you're cherry-picking the best results so your model is flawed.
Over the last 100 years, the US has had a great run and stock market returns have reflected that. By only looking at American returns you're cherry-picking the best results so your model is flawed.